json.sh, test.json: initial commit

2 files changed, 114 insertions, 0 deletions

diff --git a/json.sh b/json.sh
new file mode 100755
index 00000000..1c734b94
--- /dev/null
+++ b/json.sh
@@ -0,0 +1,109 @@
+#! /bin/sh
+set -euf
+
+# TODO check json first
+
+normalize_json() {
+  sed -rn '
+    1s/^/cat<<EOF\n/
+    # TODO handle escaped double quotes
+    s/"[^"]+"/"$(echo -n & | base64)"/g
+    $s/$/\nEOF/
+    p
+  ' | sh | tr -d '[:space:]'
+}
+
+json_to_sh() {
+  sed -rn '
+    s/,/;/g
+    s/\[/begin_json_array;/g; s/\]/end_json_array;/g
+    s/\{/begin_json_object;/g; s/\}/end_json_object;/g
+    s/("[^"]+"):/json_set_key \1;/g
+    s/;("[^"]+")/;json_set STR \1;/g
+    s/;([0-9]+)/;json_set INT `echo -n \1 | base64`;/g
+    s/;;/;/g
+    s/;/\n/g
+    p
+  '
+}
+
+begin_json_object() {
+  push_key %%%MAKEJSONOBJ%%%
+}
+end_json_object() {
+  #echo end_json_object: $key >&2
+  #echo `echo "$key_stack" | head -n 1` >&2
+  pop_key # TODO check if is %%%MAKEJSONOBJ%%%
+  set -- `print_key`
+  #echo object: $1 >&2; set | sed -rn "s/^($1_[a-zA-Z]+)_VALUE=(.*)/\1/p" >&2
+  json_set OBJ "`set | sed -rn "s/^($1_[a-zA-Z]+)_VALUE=(.*)/\1/p"`"
+}
+begin_json_array() { :; }
+end_json_array() { :; }
+json_push_key() {
+  push_key "`echo -n "$1" | base64 -d`"
+}
+json_set_key() {
+  pop_key
+  json_push_key "$1"
+}
+json_set() {
+  ##echo "`print_key`$1=$2 (`echo -n $2 | base64 -d`)" >&2
+  #echo "`print_key`TYPE=$1" >&2
+  #echo "`print_key`VALUE=\"$2\"" >&2 # (`echo -n $2 | base64 -d`)" >&2
+  eval "`print_key`_TYPE=$1"
+  eval "`print_key`_VALUE=\"$2\""
+}
+
+push_key() {
+  key="${key+${key}_}$1"
+  #key_stack="$1
+#$key_stack"
+}
+pop_key() {
+  key="`echo $key | sed 's/_[^_]\+$//'`"
+  #key_stack="`echo "$key_stack" | sed 1d`"
+}
+print_key() {
+  ##echo \<`echo print_key: $key`, `echo "$key_stack" | tac | tr '\n' _`\> >&2
+  #echo "$key_stack" | tac | tr '\n' _
+  echo -n "$key"
+}
+
+json() {
+  #eval echo "\"\$`echo -n JSON "$@" | tr "$IFS" _`\" | base64 -d"
+  NAME="`echo -n JSON "$@" | tr "$IFS" _`"
+  eval "TYPE=\"\$${NAME}_TYPE\""
+
+  echo -n "$TYPE $NAME: "
+  case "$TYPE" in
+    (OBJ)
+      eval echo -n \$${NAME}_VALUE
+      ;;
+      #set | sed -rn "s/^(${NAME})_([a-zA-Z]+)[a-zA-Z_]*_VALUE=(.*)/\1_\2/p" |
+      #    sort | uniq | tr \\n \ ;;
+    (*) #echo -n "$VALUE";;
+      #eval "VALUE=\"\$(echo -n \"\$${NAME}_VALUE\" | base64 -d)\""
+      eval echo -n \"\$${NAME}_VALUE\" | base64 -d
+  esac
+  echo
+}
+
+key='JSON'
+#key_stack='JSON'
+meh="`cat`"
+echo "$meh"
+#echo "$meh" | normalize_json | json_to_sh; exit
+eval "`echo "$meh" | normalize_json | json_to_sh`"
+#echo ====
+#set | grep '^JSON[A-Za-z_]*='
+#echo ====
+json
+json a
+json b
+json c
+json c ca
+json c cb
+
+echo READY.
+#### End of file.
diff --git a/test.json b/test.json
new file mode 100644
index 00000000..7da5175d
--- /dev/null
+++ b/test.json
@@ -0,0 +1,5 @@
+{
+  "a": "1",
+  "b": 2,
+  "c": { "ca": 11, "cb": [1, 2, 3] }
+}